Settings: Add AOSP dummy strings

Add some empty strings to remove aapt warnings caused by
aosp strings without default translation.

Change-Id: I96f36e9768977d70bcc8ce717eb677c50ef4982d
Revert "Revert "settings: Add xxhdpi profile icon""

This reverts commit a97c4b862d5331df2252df50df9931a8574650c0.

Change-Id: I23473bf86dec09bf4d4a26287f911f25f5c21668